Not only was Sibley well represented at MLA, but several former Eastman students and Sibley colleagues were also spotted there (including Phil Ponella, Lara Snyder, and Mary Wallace Davidson).
As far as Sibley contributions go, several of us gave presentations. Dan Zager gave a talk on teaching music bibliography, and specifically on the teaching of a source like RISM to masters performance majors. Gerry Szymanski, chair of the Information Sharing Subcommittee, led a very well attended session on Web 2.0 products that various libraries are using. Gerry's own 10 minutes was spent sharing information on Pandora.
Alice Carli, Jim Farrington, and Linda Blair presented a poster session on Sibley's score digitization efforts. This will be put up electronically in the near future, and we'll add a link to it when that happens. Alice was also part of a session in her role as outgoing chair of the Peservation Cmmittee, discussing the new committee's website. Jim also played in the MLA Big Band, a slideshow of which can be seen here.